def f(x):
    return len(x)

b = ["hello", "helloworld", "he", "hao", "good"]
c=sorted(b,key=f,reverse=True)
print(c)

def a(e):
    return abs(e)
li = [1, -6, 2, -5, 9, 4, 20, -3]
l=sorted(li,key=a)
print(l)



#
class Zz:
    pass
susu=Zz()
susu.heigh =190
print(susu.heigh)

